The national postal service of Serbia is known as Pošta Srbije (Post of Serbia), with its headquarters in Belgrade. This state-run postal service has been operational since 1840, and the first postage stamp was printed in 1866. In 1874, it became one of the founding members of the Universal Postal Union, which comprised 21 other countries. Posta Srbije is the most significant infrastructure and logistics business system in Serbia, covering the country's entire territory. It provides universal postal services and holds the exclusive right to offer reserved services within specified weight and price limits guaranteed by the state. The universal postal service is regarded as a general interest activity, encompassing a range of postal services consistently provided throughout the territory of the Republic of Serbia, ensuring established quality, affordable prices, and equal terms for all customers. Apart from the universal postal services, other companies authorized by the Electronic Communications and Postal Regulatory Agency also provide commercial services. This segment operates under free competition.